William f



(No Model.)

W. F. DRAPBR.

SPINDLE AND BOLSTBR FOR SPINNING MACHINES.

No. 253,021. Patented Jan. 31,1882.

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PATENT FFICE.

WILLIAM F. DRAPER, OF HOIEDALE, MASSACHUSETTS.

SPINDLE AND BOLSTER FDR SPINNING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 253,021, dated January 31, 1882,

Application filed June 21, 1881. (No modehl T 0 all whom it may concern: 7

Be it known that I, WILLIAM F. DnArEu, of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Spindles and Bolsters for Spinning-llIachines, of which the following description, in connection with the accompanying drawings, is a specification.

The spindle. hereinafter described is an improvement on the class of spindles which have a downwardly-extending sleeve, to which the band-whirl is attached, said sleeve encompassing a fixed vertical tube, within which is a yielding bolster-bearing for the pintle of the. spindle, and which bolster is capable of movement within the bolster-tube, to enable the spindle, untammeled by any confining footstep, to find its own center of gravity when rotating under an unbalanced load.

In a former application, No. 31,379, for Letters Patent made by me, and filed April 21, 1881, for animprovemcnt in this class of spindles I have shown the centcr of the band-whirl in substantially the same plane with the foot of the spindle.

In my present invention 1 have so constructed and arranged the parts composing the spindle that the groove of the band-whirl is located in a plane coinciding substantially with the top of the yielding bolster, as I have found that by so doing the pull of the driving-band on the whirl will not be able to spring or bend the pintle or bearing portion of the spindle in the bolster, and therefore with this construction I am able to reduce this portion of the spindle to a less diameter than has heretofore been practicable. As a result I have diminished greatly the power required to drive the spindle under the ordinary conditions existing in spinningyarn. I prefer with this arrangement to make use of a bolster the upper endof which is rounded and of greater diameter than the portion which is surrounded with the elastic or yieldin g packin g j acket, and the edge of this rounded portion is at its largest diametrical plane in contact with the interior of the fixed bolster-tube, as shown in the drawings; but a cylindrical bolster surrounded by a yielding jacket can also, under an arrangement of the sleevewhirl relatively to the top of such bolster and to the fixed bolster-tube, as above described, be used to great advantage.

, In order to prevent the slender pintle of the spindle from being bent from the effect of extraordinary strain from careless dotting, the spindle-sleeve is extended below the whirl, and the lower edge of this extended portion will, when the spindle is unduly deflected from the vertical, bring up againstthe. fixed bolster-tube, and ifthe space between theinteriorofsuch tube and the exterior of the bolster o cupiedby a yielding cushion be of proper width, the pin-,

tle, however slender it may be made, will be perfectly protected.

Referring to the drawings, Figure 1 represents in partial vertical section a sleeve-whirl spindle, bolster, and tube, with an oiling supply-reservoir attached. Fig. 2 exhibits the same construction with the oil-tube omitted.

A represents the blade, or that part of the spindle which, in spinning. carries the bobbin.

B is the sleeve of the spindle, encompassing the fixed bolster-tube a, carrying a grooved whirl, I), and having an annular extension below the whirl. The pintle or hearing portion of the spindle is represented at c.

I) is the bolster, surrounded by a yielding jacket, d. The bolster will preferably have an enlarged head, (1, with its edge in contactwith the interior surface of the bolster-tube, but rounded, so as not to interfere with .the oscillation of the spindle in the effort to accommodate itself to an unbalanced load; and E is the supportfor the foot of the pintle, of such form as not to prevent the movement of the foot radially.

Great practical advantages result from 10- cating the whirl b so that the pull of the driving-band will be in a plane coinciding substantially with the top of the bolster. In case a bolster be employed with the enlarged head d, the strain of the band is resisted by the head, which in turn is supported laterally by the fixed bolster-tube a, and even in case acylindrical bolster be used not provided with a head in contact with the wall of the tube, such strain as comes upon the pintle during the spinning operation will be most favorably reconstruction described, practically, and have found that I am able to reduce the diameter of the bearing portion of the spindle c to less than one-fifth of an inch, although the length f such bearing portion was one and one-quarter inch.

If the whirl were located differently in reference to the bolster, it would be impossible to make spindles for practical use with pintles so slender, on account of their liability to become bent from the eifect of the strain of the band when unduly tightened from a contraction under atmospheric changes.

The sleeve B being a part of the spindle and having an annular extension, 1), below the whirlconcentric with the fixed bolster-tube, and with its inner surface in close proximity to the adjacent exterior surface of the tube, it follows that with a proper relation of the diameter of the cylindrical portion of the bolster to the diameter of the bolster-tube, such as is indicated in the drawings, there Wlll be no danger of'bending the pintle 0 from carelessness in dofiing.

F, Fig. 1, represents an oil-supply reservoir in common use, and which, when filled with oil, finds its way to the bearing of the bolster. By the construction and arrangement of the parts of the spindle which I have above described the fixed bolster-tube may be extended to a considerable distance above the top of the bolster,formingan annular eham ber,f,asshown at Fig. 1, so that when the oil-reservoir F is filled the oil will stand in the chamberf above the bolster and flood the whole bearing; and to facilitate its rising in the bolster-tube, grooves or channels may be cut through the enlarged head of the bolster in case a bolster with such head be used.

By the term sleeve-whirl spindle as herein I mean a spindle composed of a blade for carrying the usual bobbin, of a piutle at its lower end adapted to enter and be supported by a bolster, and of a sleeve constituting a downwardly-extending annular extension to carry the band-whirl. The spindle-bolster employed will be supported in the fixed bolstertube so as to yield or move freely in the direction of movement of the lower end of the spintile, as the latter, in sliding upon the foot-rest, moves to find the true center of rotation for the spindle and the load carried by it.

I claim- 7 1. The sleeve-whirl spindle provided with a sleeve-like extension, b, below the band-groove of the whirl, combined with the yielding bolster and its support, the top of the bolster be ing located substantially in theline of the bandgroove of the whirl, whereby the sleeve-like extension below the grooved whirl guards the piutle ofthe spindle against the effect of strain, tending to deflect the spindle from the vertical, as set forth.

2. The sleeve-whirl spindle having a piutle of smaller diameter than the butt of the spindle-blade, combined with a yielding bolster and supportingtube,substantiallyas described, the band-receiving groove of the whirl, the top of the reduced part of the spindle or piutle, and the top of'the bolster being all located in substantially the same plane, as set forth.

3. The sleeve-whirl spindle, the upwardlyextended tube a, and the oil-supply reservoir extended above the plane of the top of the bolster, combined with the bolster shorter than the said supporting-tube, leaving above the bolster a chamber for the reception of oil, substantially as described.

In testimony whereofI have signed my name to this specification in the. presence of two subscribing witnesses.

WM. F. DRAPER.

Witnesses:

G. W. GREGORY, WV. 11'. SIGs'roN. 

